Minos

Reikoku, also known as the Sky Master (空のマスター, Sora no Masutā) in the anime, is the sadistic and ruthless leader of Synapse, and is also the main antagonist of the series. He finds enjoyment in torturing the Angeloids he owns (both physically and emotionally)(ie. Forcing Nymph to tear the wings off her pet bird), seeing them as merely his playthings to which he can do with as he pleases, and discarding them while considering them nothing more than trash. He is condescending towards humans, referring to them as "Downers", a trait that would be later shared with Nymph. Though because of his arrogant ways and believing that the Angeloids that serve him will obey his every order, he always reacts surprised when he witnesses one of them break their chain or go against his orders. He is often seen on his throne with two Angeloids beside him, and like Daedalus, his face is obscured in all of his appearances. He is actually impressed with Eishiro's intellect and hopes to "have more fun" with him.